/Engine/Source/Runtime/Engine/Classes/Engine/InstancedStaticMesh.h
class FInstancedStaticMeshVertexFactoryUniformShaderParameters
TShaderResource...
InstanceCustomDataBuffer
TShaderParamete...
NumCustomDataFloats
TShaderResource...
VertexFetch_InstanceLightmapBuffer
TShaderResource...
VertexFetch_InstanceOriginBuffer
TShaderResource...
VertexFetch_InstanceTransformBuffer